EP2519143B1 - Sonde de mesure de température - Google Patents
Sonde de mesure de température Download PDFInfo
- Publication number
- EP2519143B1 EP2519143B1 EP10841469.9A EP10841469A EP2519143B1 EP 2519143 B1 EP2519143 B1 EP 2519143B1 EP 10841469 A EP10841469 A EP 10841469A EP 2519143 B1 EP2519143 B1 EP 2519143B1
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- EP
- European Patent Office
- Prior art keywords
- temperature
- probe
- circuit
- circuit segment
- estimation device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/022—Means for indicating or recording specially adapted for thermometers for recording
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
- G01K1/024—Means for indicating or recording specially adapted for thermometers for remote indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
- G01K13/20—Clinical contact thermometers for use with humans or animals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/42—Circuits effecting compensation of thermal inertia; Circuits for predicting the stationary value of a temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
Definitions
- This invention relates to an apparatus and system for measurement of a temperature of a target site, such as a human body site.
- the invention includes an intelligent probe having a set of unique operating characteristics and that is configured to physically contact a target site and to communicate with a host device that can be implemented as a hand-held device or as a personal computer.
- a predictive thermometer includes a probe tip that is placed in physical contact with a target site, such as a human body site, for the purpose of measuring a temperature of that target site.
- a temperature of the target site is predicted (estimated) via real time analysis of a temperature rise of the probe tip prior to arriving at thermal equilibrium in relation to the target site.
- the probe tip may be pre-heated to a pre-determined temperature before temperature estimation. Variations in the manufacture of the predictive thermometer may cause inaccuracies with respect to estimating the temperature of the target site.
- a temperature measuring device and a temperature measuring method are described in EP 1 486 763 A1 .
- the temperature measuring device and the temperature measuring method are provided which are capable of obtaining precise measured temperature values with respect even to old persons, sucklings or infants, which device may be formed into a disposable type according to need, which method may be carried out using such a disposable type device according to need, and which enable precise temperature measurement in real time.
- An on-subject temperature measuring device which is attached to a subject when the temperature of the subject is measured, receives a radio wave from a reader as an external device and is thereby electrically powered. Using the electric power, temperature measurement is performed in the on-subject temperature measuring device. The results of the measurement are transmitted through radio waves to the reader in the form of the temperature of the subject and ID data.
- the reader is so constructed as to be connectable to a personal computer, and data processing by the personal computer is performed according to need.
- the prediction-type electronic thermometer has an actively controlled heater element which thermally isolates the probe tip from the probe shaft. Rapid and accurate temperature measurements are made using predictive algorithms. Control circuitry reads input from the temperature sensing element to compute best heater control signals so that the temperature of the probe shaft rapidly follows changes in the temperature of the probe tip. Thermal isolation between probe shaft and tip impedes heat flow from the heater element to the tip providing more accurate measurements. Rapid and accurate management of shaft temperature allows heat from the patient being measured to be most efficiently transmitted to the temperature sensor element resulting in very fast temperature measurements.
- the description provides for an apparatus, system and method for measurement of a temperature of a target site, such a human body site.
- the invention includes an intelligent probe that is configured to physically contact a target site and to communicate with a host device that can be implemented as a hand-held device or as a personal computer.
- the host device such as a personal computer, can compute, store and display an accurate predicted temperature, or a measured temperature at thermal equilibrium of the target site.
- the host device is configured to interface with and adapt to each of a plurality of different intelligent temperature probes that each have unique and varied operating characteristics.
- a set of unique operating characteristics for each temperature probe is represented by information including a procedural model that is communicated between each respective temperature probe and the host device.
- FIG. 1A illustrates a first embodiment of a hand held and universal serial bus powered temperature-measurement probe device 110 and a host device 150 that is implemented as a personal computer.
- the temperature-measurement probe device 110 also referred to as a device 110, includes a probe portion 112, a handle portion 114, a power and data connection cable 122 and a power and data connector 124.
- the probe portion 112 also referred to as a probe body 112 is an elongated member that is designed to be placed in physical contact with a target location, such as in contact with a human body site.
- the probe tip 112a is preferably made from temperature sensitive material, for example made from a metal alloy including such as stainless steel or aluminum.
- the probe portion 112 includes a probe tip 112a at a distal end located farthest from the handle portion 114 of the device 110.
- the handle portion 114 is designed to be held within a hand of a user of the device 110. As shown, the handle portion includes a plurality of one or more visual indicators 116a-116c and a plurality of one or more buttons 118a-118b. In some embodiments, a visual indicator 116a-116c is implemented as a light emitting diode (LED).
- LED light emitting diode
- the power and data connector 124 which is also referred to as the connector 124, is a male universal serial bus (USB) connector.
- the power and data connection cable 122 also referred to as the cable 122, provides for electronic communication between the handle portion 114 and the connector 124.
- the connector 124 is designed to engage a female USB connector, such as the female USB connector 154 that resides within a chassis 152 of a personal computer 150.
- the cable is implemented as a serial or parallel bus in accordance with standards other than USB.
- the device 110 includes a first electronic circuit path (circuit segment) (not shown), also referred to herein as a "path", having one or more electrical characteristics that are sensitive to and can be mapped to a temperature of a target site, referred to as a target temperature.
- a circuit path (path) can be implemented as a collection of electrical circuitry and/or other technology to achieve the functions described herein.
- the first circuit path includes a thermistor that functions like an electrical resister.
- the electrical resistance of the thermistor is a function of the temperature of the thermistor, while the temperature of the thermistor is a function of a probe temperature at a location 112a within the probe body.
- the probe temperature is itself a function of the target temperature.
- the target temperature is a temperature at a target site location (See FIG. 2 ), which is typically a human body site.
- other temperature sensitive components such as a thermopile, are employed.
- the first circuit path includes a memory that is configured to store temperature correlation information, also referred to as temperature-correlation data.
- the temperature correlation information represents a correlation between the electrical characteristics of the first circuit path and the probe temperature and a target temperature at a point in time.
- Circuit-measurement data represents the electrical characteristics of the first circuit as measured with respect to time.
- the circuit-measurement data typically measures the electrical characteristics over a period of time that is approximately 5 minutes or less in duration.
- circuit-measurement data measures an electrical resistance of the thermistor of the first circuit path over time.
- the memory can also store one or more instances of circuit-measurement data in addition to the temperature-correlation data.
- the first circuit path includes at least one or more communications nodes (not shown) that are configured for communication of information (data) to a second circuit path (circuit segment) that resides outside of the device 110.
- the communications node (not shown) electrically connects the first circuit path with the cable 122.
- information stored in the memory of the first circuit path is communicated via the communications node, the cable 122 and the USB connector 124 to the second circuit path residing outside of the device 110.
- the second circuit path (not shown) resides within the personal computer 150 and the information stored in memory of the first circuit path is further communicated to the second circuit path through the male USB connector 124 and female USB connector 154.
- the second circuit path is configured to receive the temperature correlation information that is communicated from the first circuit path of the device 110.
- the second circuit path is also configured to measure and/or receive the electrical characteristics (circuit-measurement data) of the first circuit path in order to perform an estimation of the target temperature while employing the temperature-correlation data.
- the temperature correlation information includes a definition of a procedural model that correlates the electrical characteristics with the target temperature.
- the procedural model factors characteristics of each particular device 110 with respect to its particular design and to its particular manufacture. These characteristics include electrical and thermal characteristics of the device 110.
- Each particular manufacture of a device 110 is associated with manufacturing specific factors, for example, the amounts of bonding adhesives/epoxy used within the device 110 can significantly affect the rate of temperature change that is being sensed by the apparatus.
- the probe includes a heater (See FIG. 2 ), also referred to as a probe heater, that is located within the probe tip 112a.
- the probe heater is designed to generate heat in order to elevate the probe temperature to a predetermined temperature value.
- the predetermined temperature value is selected to equal a temperature value less than an expected target temperature value. With respect to a target being a human body site, the target temperature would be expected to be equal to or greater than 36.67 degrees Celsius (98 degrees Fahrenheit).
- a visual indicator 116a activates to indicate a ready state for the device 110.
- the visual indicator 116a-116c When activating, the visual indicator 116a-116c projects light of a predetermined color, for example of a green color, to indicate that the probe is fully heated to the predetermined temperature and that the device is ready for estimating a target temperature of a target site.
- a predetermined color for example of a green color
- one of the visual indicators 116a-116c can be assigned to function as probe heating complete indicator.
- the probe tip 112a is placed in physical contact with a target site and heat from the target site flows into the probe tip 112a. As the heat flows, the probe temperature increases over time.
- a temperature measurement procedure inputs (samples) the probe temperature at a predetermined frequency over time and algorithmically determines an estimated target temperature prior to the occurrence of thermal equilibrium.
- the estimated target temperature is also referred to as a predicted target temperature.
- the temperature measurement procedure is implemented as digital logic that resides within electronic circuitry residing within the device 110 or within the host 150.
- the digital logic is implemented as software that is stored in the memory and that directs the operation of a processor (CPU) 314 (See FIG. 3A ).
- An amount of time required to determine a predicted target temperature is typically less than one minute.
- An amount of time required to reach thermal equilibrium typically about 5 minutes.
- the frequency of probe temperature sampling is at least one sample per second.
- the probe temperature Upon the device 110 determining a predicted target temperature, if the probe remains in physical contact with the target site, the probe temperature will continue to elevate until reaching thermal equilibrium. Upon reaching thermal equilibrium, the value of the probe temperature approximates the value of the target temperature. The value of the probe temperature at thermal equilibrium is also referred to as the manual complete or monitor complete temperature of the target site.
- the temperature measurement procedure includes a circuit-measurement data acquisition portion and a temperature prediction portion. Circuit-measurement data is obtained and then processed to determine an estimated (predicted) temperature of the target site 230 before reaching thermal equilibrium.
- the device 110 activates a visual indicator 116a-116c to project light, optionally of a particular color, for example of a blue color, to indicate that the data acquisition portion of the temperature measurement procedure is complete.
- a visual indicator 116a-116c can be assigned to function as a data acquisition complete indicator.
- another visual indicator 116a-116c is activated to indicate that the temperature prediction portion is complete, for embodiments where the probed device 110 performs temperature prediction without assistance of the host device 150 (See FIG. 1C ).
- another visual indicator 166a-116c is activated to indicate that the temperature measurement at thermal equilibrium is complete.
- one of the visual indicators 116a-116c can be assigned to function as a thermal equilibrium complete indicator
- the device 110 while determining a predicted target temperature, the device 110 is electrically connected to the host 150 via the connection cable 122.
- the host 150 receives the temperature correlation information from the device 110 and receives the circuit-measurement data associated with the predicted target temperature.
- the host 150 processes the circuit-measurement data in combination with the temperature correlation information in order to determine the predicted target temperature.
- the predicted target temperature is displayed via the user interface display monitor 156, also referred to as a user interface 156 or display 156.
- the device 110 is charged with electrical power that is received through the connection 122 and detached from the host 150 and placed in physical contact with a target site. Upon obtaining sufficient circuit-measurement data to determine a predicted and/or a thermal equilibrium temperature, the device 110 is attached to, and the circuit-measurement data and temperature correlation are communicated to, the host 150 for determination and display of the predicted and/or thermal equilibrium temperature.
- the device 110 includes a wireline (wired) communications node (See FIG. 3A-3C )that enables the device to communicate with the host 150 via the connection cable 122.
- the device 110 instead includes a wireless communication node that communicates with a host 150 via a wireless communications channel.
- FIG. 1B illustrates a second embodiment of the temperature-measurement probe device 110 that is designed to attached into a probe cradle 154.
- the probe cradle 154 is electrically connected to a personal computer 150 via a communications cable 158.
- the device 110b includes a connector 126 that is designed to be inserted into an upper side of the probe cradle 154.
- the device 110 electrically attaches to the probe cradle 154 for transfer of power and data between the host 150 and the device 110b via a communications channel established by the probe cradle 154 and communications cable 158.
- Digital logic residing within the device 112 detects attachment to the probe cradle 154 and detachment from the probe cradle 154.
- the device 110b can initiate the heater and/or the execution of the temperature prediction algorithm separate from the pressing of any button 118a-118b.
- the device 110b Upon attachment of the device 110b to the probe cradle 154, the device 110b communicates any circuit-measurement data and temperature correlation information to the host 150 via the probe cradle 154.
- FIG. 1C illustrates a third embodiment 110c of the temperature-measurement probe 110c that is designed to compute and display a predicted measured temperature.
- a handle portion of the device 110c includes a small display screen 130.
- the display screen 130 is designed to display a predicted or thermal equilibrium temperature as determined by the device 110 c.
- This embodiment of the device 110c obtains the circuit-measurement data and further determines a predicted or thermal equilibrium temperature using the temperature correlation information.
- the host device 150 is implemented as a portable personal computer based device, such as a hand carriable (laptop) or as a hand held computing device.
- the host device 150 is implemented as a customized temperature estimation device, like that shown as the hand held apparatus (figure reference 10) of FIG. 1 of the U.S. Patent 7,255,475 referred to above and also referred to as the '475 patent.
- the probe is configured to establish a physical connection to the temperature estimation apparatus (device).
- the probe of the invention described herein is connected to the hand held apparatus via a universal serial bus connection.
- probe of the invention described herein can be implemented as being removably attachable to the host 150 regardless of how the host 150 is implemented.
- FIG. 2 illustrates an interior view of the distal end temperature-measurement probe of FIGS. 1A , 1B and 1C .
- the interior of the distal end (tip) 112a of the temperature-measurement probe includes a thermistor 210 and a heater 220 that are each disposed adjacent to an inside wall of the probe tip 112a.
- the thermistor 210 functions like an electrical resister and inputs electrical current via electrical circuit segment 212a and outputs electrical current via electrical circuit segment 212b.
- the electrical resistance of the thermistor is a function of the temperature of the thermistor, and which is a function of the target temperature at the target site location 230.
- the target site location 230 is typically a collection of tissue of a human body site.
- the heater 220 inputs electrical current via electrical circuit segment 222a and outputs electrical current via electrical circuit segment 222b. Electrical current passing through the heater 220 generates heat and raises the temperature of the probe tip 112a. The heater 220 operates until the thermistor 210 indicates that the temperature of the thermistor 210 has arrived at a predetermined target temperature.
- FIG. 3A illustrates a conceptual block diagram of core electronic circuitry residing within the temperature-measurement probe 112 of FIGS. 1A-1C and 2 .
- a central processing unit (CPU) 314 also referred to as a processor 314, is attached to a system bus 312.
- the system bus enables the CPU 314 to interface with other components that are also attached to the system bus 312.
- These other components include a switch interface 316, a visual/audio interface 318, a power interface 320, a communications interface 322, a memory 324, a heater interface 326, an analog to digital (A/D) converter 328 and a thermistor interface 330.
- A/D analog to digital
- the switch interface 316 is designed to detect and communicate an event associated with the device 110. For example, the switch interface 316 detects a button press event associated with at least one button 118a-118b. Also, the switch interface 316 detects an attachment or detachment event between the device 110 and the cradle 154.
- the device 110 can be configured to take action, such as initiate operation of the heater 220 or to initiate execution of the temperature prediction algorithm, upon the press of a button 118a-118b or upon detachment of the device from the cradle 154. Initiation of electrical charging of the device 110 occurs upon attachment of the device to the cradle 154.
- the visual/audio interface 318 is designed to communicate with the user of the device 110. For example, if and when operation of the heater 220 is initiated, a visual and/or audio indication is communicated to the user. In some embodiments, a light emitting diode 116a-116c emits light to indicate operation of the heater 220. Optionally, an audible sound is emitted to indicate the operation of the heater 220. Likewise, a visual and/or audio indication is communicated to the user to indicate arrival of the device 110 at a target temperature, termination of the heater 220 operation, determination of a predicted temperature and/or determination of a thermal equilibrium temperature.
- the communication interface 322 enables communication of information between the device 110 and the host 150.
- the communication can be via the connection cable 122, via the cradle 154 (if applicable) or via a wireless communication channel (if applicable).
- the information that is communicated includes the temperature correlation information and circuit-measurement data.
- the communications interface acts as an interface to a communications node.
- the communications node is implemented to communicate via a wireline communications channel, such as implemented with universal serial bus (USB) technology.
- USB universal serial bus
- the communications node is implemented to communicate via a wireless communications channel, and is implemented via wireless communication technology, that is designed in accordance with IEEE 802.11, IEEE 802.15 or Zigbee 802.15.4 communication standards, for example.
- the memory 324 stores the temperature correlation information and circuit-measurement data along with software.
- the software includes CPU instructions and data that control the operation of the device 110.
- the software directs the CPU 314 to send commands to, and to receive status information from, the other components that are attached to the system bus 312.
- the power interface 320 supplies electrical power to the device 110.
- the electrical power can be supplied via the connection cable 122, via the cradle 154 (if applicable) or via a capacitor (not shown).
- Embodiments that include a capacitor enable charge of the capacitor while attached to the host 150 via the connection cable 122 or attached to the host via the cradle 154.
- the capacitor enables the device 110 to be powered while detached from the host 150 and the cradle 154 (if applicable).
- the heater interface 326 enables the CPU 314 to control operation of the heater 220.
- the heater interface 326 is enabled as a port within a single chip microcomputer.
- the CPU 314 writes commands into a port register that directs heater interface circuitry to supply current to the heater 220.
- the heater 220 generates heat in order to raise the temperature of the probe 122 until it arrives a predetermined temperature.
- the thermistor interface 330 enables the CPU 314 to control operation of the thermistor 210.
- the thermistor interface 330 is enabled as a port within a single chip microcomputer.
- the CPU 314 writes commands into a port register that directs thermistor interface circuitry to supply a fixed electrical current to, or fixed voltage across, the thermistor 210.
- the thermistor interface 330 supplies a fixed current to the thermistor 210.
- the thermistor applies a fixed voltage across the thermistor 210 in order to measure the electrical current passing through the thermistor 210.
- a measured amount of electrical current flowing through the thermistor 210, in combination with the fixed voltage, indicates the resistance of the thermistor 210 at a point in time.
- Some embodiments of the invention do not include all of the aforementioned components.
- FIG. 3B-3E illustrate conceptual block diagrams of embodiments of power and communications circuitry for the temperature-measurement probe device 110.
- FIG. 3B illustrates an embodiment of the device 110 that is powered via a universal serial bus (USB) interface 340.
- the USB interface 340 includes electronic circuitry that resides within the device 110 and that is electrically attachable to the host 150 via the USB connection cable 122.
- the USB interface 340 also referred to as the USB hardware 340, is designed to transfer electrical power and data between the device 110 and the host 150 while electrically attached to the host 150 via the USB connection cable 122. Electrical power transfers from the host 150 via the connection cable 122 to the USB interface component 340. Data is transferred from the device 110 via the USB interface component 340 and via the USB connection cable 122 to the host 150, and from the host 150 to the device 110 via the same electrical path.
- FIG. 3C illustrates the embodiment of FIG. 3B further including an electrical capacitor 346.
- the capacitor 346 enables the device 110 to operate while being electrically detached from the host device 150. Electrical power that is supplied via the USB interface 340 is employed to supply electrical charge to the capacitor 346. Upon supplying a sufficient electrical charge to the capacitor 346, the device 110 is detached from the host device 150 via detachment of the USB connection cable 122 from the host device 150. The user of the probe device 150 is then free to move the device 110 farther away from the host device 150 in order to physically contact the device 1 10 with a target site associated with a human target. Electrical charge stored within the capacitor 346 enables the device 110 to perform heating and to, at least, gather circuit-measurement data during physical contact with a target-set location. The device 110 can further perform a predicted temperature or thermal equilibrium temperature determination.
- the device 110 can obtain multiple sets of circuit-measurement data associated with multiple physical contacts with one target or with multiple targets before re-attaching the probe device to the host device 150.
- the circuit-measurement data in combination with the temperature-correlation data, is transferred to the host device for storage and processing into one or more temperature values. Those temperature values may be predicted and/or at thermal equilibrium.
- FIG. 3D illustrates the embodiment of FIG. 3C further including a wireless communications node 350.
- the wireless communications node 350 enables the device 110 to communicate with the host device 150 without being electrically attached to the host device via the connection cable 122.
- the capacitor 346 supplies electrical power to the wireless communications node 350 via the power interface 320.
- the wireless communications node 350 establishes a wireless communications channel with the host device 150 in accordance with IEEE 802.11, IEEE 802.15 and Zigbee 802.15.4 communication standards.
- FIG. 3E illustrates an embodiment of the device 110 that includes a battery 348 and a wireless communications node.
- the battery enables the device 110 to be used in a portable manner. Unlike the prior described embodiments, this embodiment does not necessarily require a USB interface 340 to receive electrical power from another device.
- the battery can be pre-charged and installed into the device 110. This feature enables the device 110 to have electrical power without a cable connection, such as a USB cable 122 connection with another device, such as the host device 150.
- FIG. 4A illustrates a functional relationship 410 between an electrical resistance 414 of an embodiment of a thermistor 210 and the temperature 412 of the thermistor 210.
- the electrical resistance 414 is measured in ohms and temperature is measured in, for example, degrees Celsius (degrees Fahrenheit).
- the thermistor 210 is classified as operating in accordance with a negative temperature coefficient, meaning that the electrical resistance 414 of the thermistor 210 decreases as a function of its rising temperature 412. In other words, the higher the thermistor's temperature 412 the lower its electrical resistance 414 and the lower the thermistor's temperature 412 the higher its electrical resistance 414.
- the thermistor 210 can operate in accordance with a different temperature coefficient than that of the embodiment of the thermistor 210 that is associated with the relationship 410 shown. Operating in accordance with a different temperature coefficient would result in a different functional relationship between the other thermistor's temperature 412 and its electrical resistance 414. Such a temperature coefficient could equal a value that is negative (below 0.0) or in some circumstances a positive value (above 0.0).
- FIG. 4B illustrates a relationship 420 between a temperature 412 of the thermistor 210 and time 416.
- physical engagement of the probe tip 112a to a target site 230 having a temperature that is higher than that of the probe tip 112a causes transfer of heat from the target site 230 to the probe tip 112a and causes an increase over a period of time 424 to the temperature 412 of the probe tip 112a and to the temperature 412 of the thermistor 220 within the probe tip 112a.
- the temperature of the probe tip 112a and the temperature 412 of the thermistor 210 eventually rise to an equilibrium temperature value 428 that is slightly less than or equal to the temperature of the target site 230.
- the thermistor temperature 412 equals a lower temperature value 422 at time 416a and then substantially rises during a period of time 424, that is referred to as a dynamic rise time period 424.
- the dynamic rise time period 424 includes instances (points) in time 416a-416e that are each respectively associated with a temperature value 412a-412e of the thermistor.
- the dynamic rise time period 424 eventually terminates upon arriving at a thermal equilibrium temperature 428 which occurs at time 416f.
- the resistance value of the thermistor 220 substantially decreases during the dynamic temperature rise time period 424 while the probe tip 112a is placed in physical contact to the target 230.
- the relationship between the electrical resistance value of the thermistor 220 over a period of time is recorded within circuit-measurement data.
- the circuit-measurement data represents measurement of electrical characteristics of the first circuit path, including and/or indicating the resistance value 414 of the thermistor 220, as a function of time 416 and over period of time including at least a portion of the dynamic rise time 424.
- Temperature correlation information is employed to execute a procedure that inputs information provided by the circuit-measurement data in order to determine an estimated (predicted) temperature value of the target site 230.
- the temperature correlation information provides a mapping of electrical resistance of the thermistor to a temperature of the thermistor as shown in FIG. 4A .
- the temperature of the thermistor versus time is determined as shown in FIG. 4B .
- the temperature correlation information further includes information mapping a thermistor temperature versus time to a predicted (estimated) thermistor temperature at thermal equilibrium, and further includes information that maps a predicted thermistor temperature at thermal equilibrium to a probe temperature at thermal equilibrium and further includes information to map the probe temperature at thermal equilibrium to a target temperature.
- FIG. 4C illustrates an embodiment of programming script 470 that represents a procedure, also referred to as a procedural model, that is constructed in accordance with temperature correlation information.
- the script 470 is a collection of digital logic that defines a procedure for processing the circuit-measurement data.
- the script 470 is expressed as a set of directives like that of a computer programming language and is designed to exercise, at least in part, a relationship between circuit-measurement data and an estimated (predicted) temperature of the target site 230.
- the circuit-measurement data is associated with a particular points in time within a period of time within which the circuit-measurement data is collected.
- the circuit-measurement data collection is initiated before time period 424 and terminated after time period 424.
- this embodiment of script 470 employs a syntax like that of the C programming language.
- the script 470 defines a procedure named Temp_predict_procedure() 472 which is stored in the memory 324 of an embodiment of the device 110. This procedure is employed to determine an estimated (predicted) temperature of a target site 230 that is in physical contact with that embodiment of the device 110.
- the procedure accesses the circuit-measurement data that was collected by the device 110 while it was in physical contact with the target site 230.
- the circuit-measurement data is accessed via a library of function calls, such as the cmd_temp() function call 478 that is employed in this script 470.
- this procedure defines and sets initial values for (8) script variables.
- (4) variables 474a-474d are employed as constant numerical coefficient values within a mathematical expression 480 that is exercised within the procedure to determine a value of the Temp_predict variable.
- the procedure 470 returns (outputs) the predicted (estimated) temperature by returning the Temp_predict_variable 482.
- variables 476b-476d are employed as values that are each passed as a parameter to a cmd_temp() function 478a-478c.
- the cmd_temp() function 478a-478c extracts a temperature value from circuit-measurement data (CMD) that is associated with a time value (476b-476d) that is passed to it as a parameter.
- the time parameter is an offset (in seconds) within a period of time within which circuit measurement data collection occurs.
- cmd_temp (1.75) returns a temperature value at a point in time occurring in time 1.75 seconds after the initiation of the circuit-measurement data collection time period.
- cmd_time(temperature value) (not shown here) returns a time for a first and if applicable, next occurrence of a temperature value measured within the circuit-measurement data collection time period.
- script can obtain and process additional temperature values at different points in time from the circuit-measurement data (CMD).
- CMD circuit-measurement data
- other embodiments of the script can employ other C programming constructs such a IF, ELSE and ELSE IF statements to more conditionally process circuit-measurement data (CMD) based upon values retrieved from the CMD.
- values of script variables factor a difference between a temperature of the thermistor and an estimated temperature of the target site 230, based upon known design and manufacturing characteristics of the particular device 110 that is associated with and stores the script procedure 470.
- each separately designed and manufactured device 110 can store and communicate its own customized script to a host device 150.
- Each customized script reflects design and manufacturing idiosyncrasies of each probed device 110. If newer and/or more effective scripts are developed in association with a particular device 110, then that newer script can be stored onto that particular device 110 and later exercised (executed) by a host device 150, in order to quickly and accurately predict a temperature of a target site 230 in physical contact with the device 110.
- temperature prediction is no longer limited to an exercise of any one procedure or mathematical model that is associated with such a procedure. Entirely different procedures and/or mathematical models can be developed and exercised for a same device 110 or each customized for each of a set of different probe devices 110.
- a temperature estimation procedure can be upgraded and refined over time for a particular manufactured device 110, or for a classification of like designed probe devices, and varied for differently designed probe devices 110.
- a host device 150 will be able to perform temperature estimation for devices 110 that are designed and or manufactured after a commercial release of the host device 150.
- FIG. 5 illustrates information exchange between the temperature probe 110, a host device 150 and an electronic medical records (EMR) system 500.
- the EMR system includes a repository of information (data) 502 that is implemented in some embodiments as a data base 502. Temperature measurements performed by the device 110 are communicated to and stored into the EMR system 500.
- the host device 150 is designed to associate patient and time of measurement information with temperature measurements performed by the device 110.
- the probe device performs both circuit-measurement data collection and temperature prediction, which are both communicated to the host device 150 from the device 110.
- the device 110 performs circuit-measurement data collection that is communicated to the host device 150 from the device 110.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Claims (21)
- Sonde de mesure de température (110), comprenant :un corps de sonde (112) ;un premier segment de circuit résidant à l'intérieur de ladite sonde de mesure de température (110) et ayant une caractéristique électrique sensible à une température de sonde à un emplacement à l'intérieur dudit corps de sonde (112), ledit premier segment de circuit générant des données de mesure du circuit et comprenant une mémoire configurée pour stocker des informations de corrélation de température, dans laquellelesdites informations de corrélation de température comprennent un premier modèle procédural personnalisé corrélant lesdites données de mesure du circuit avec ladite température de sonde et une température cible, dans laquelleledit premier modèle procédural personnalisé comprend une expression mathématique (480) qui comprend une variable de prédiction de température (482) déterminée comme une fonction d'une pluralité de valeurs de données de mesure du circuit, chaque valeur de données de mesure du circuit étant associée à une variable de valeur de coefficient (474a - 474d) et à une variable de valeur de temps (476b - 476d);caractérisée en ce que le premier segment de circuit comprend en outre un noeud de communication,dans laquelle ledit noeud de communication est configuré pour une communication avec un second segment de circuit, ledit second segment de circuit étant configuré pour recevoir lesdites informations de corrélation de température comprenant ledit premier modèle procédural personnalisé et lesdites données de mesure du circuit dudit premier segment de circuit pour évaluer ladite température de sonde et ladite température cible, etdans laquelle le second segment de circuit est configuré pour traiter un second modèle procédural personnalisé d'une seconde sonde de mesure de température (110) interchangeable avec la première sonde de mesure de température (110), dans laquelle le second modèle procédural personnalisé est différent du premier modèle procédural personnalisé.
- Sonde (110) selon la revendication 1, dans laquelle ledit premier segment de circuit comprend un thermistor (210) ou une thermopile.
- Sonde (110) selon la revendication 1, dans laquelle ledit premier modèle procédural personnalisé est représenté comme un ensemble de directives de langage de programmation informatique.
- Sonde (110) selon la revendication 1, dans laquelle ledit noeud de communication dudit premier segment de circuit communique des informations par un canal de communication sans fil audit second segment de circuit ou par un canal de communication câblé audit second segment de circuit.
- Sonde (110) selon la revendication 4, dans laquelle ledit canal de communication câblé est un bus série universel et dans laquelle ledit noeud de communication est connecté électriquement à un premier connecteur de bus série universel (124) et dans laquelle ledit premier connecteur de bus série universel (124) est configuré pour se connecter électriquement à un second connecteur de bus série universel (154) qui est électriquement connecté audit second segment de circuit.
- Sonde (110) selon la revendication 1, dans laquelle ledit second segment de circuit fait partie d'un dispositif d'évaluation de température (150) et dans laquelle ladite sonde (110) est configurée pour permettre l'établissement d'une connexion physique audit dispositif d'évaluation de température (150).
- Sonde (110) selon la revendication 6, dans laquelle ladite connexion physique établit une connexion de communication entre ladite sonde (110) et ledit dispositif (150).
- Sonde (110) selon la revendication 1, dans laquelle ledit second segment de circuit fait partie d'un dispositif d'évaluation de température (150) et dans laquelle ladite sonde (110) est configurée pour établir une connexion de communication entre ladite sonde (110) et ledit dispositif d'évaluation de température (150) sans nécessiter une connexion physique entre ladite sonde (110) et ledit dispositif (150).
- Sonde (110) selon la revendication 6, dans laquelle ledit dispositif d'évaluation de température (150) est mis en oeuvre, au moins en partie, comme un logiciel s'exécutant dans un ordinateur (150).
- Sonde (110) selon la revendication 6, dans laquelle une première température cible est évaluée pour une première sonde (110) ayant un premier ensemble de caractéristiques électriques et thermiques et un premier modèle procédural, avec ladite première sonde (110) ayant une première connexion de communication audit dispositif d'évaluation de température, et dans laquelle une seconde température cible est évaluée pour une seconde sonde (110) ayant un second ensemble de caractéristiques électriques et thermiques et un second modèle procédural, avec ladite seconde sonde de température (110) ayant une seconde connexion de communication audit dispositif d'évaluation de température, et dans laquelle lesdits premier et second ensembles présentent au moins une caractéristique électrique, une caractéristique thermique et/ou un modèle procédural différents.
- Sonde (110) selon la revendication 1, dans laquelle ladite sonde (110) est configurée pour stocker une charge électrique en l'absence d'une connexion physique audit second segment de circuit.
- Sonde de température (110) selon la revendication 11, dans laquelle ladite sonde (110) est configurée pour stocker dans ladite mémoire lesdites données de mesure du circuit en l'absence d'une connexion physique audit second segment de circuit.
- Sonde (110) selon la revendication 1, dans laquelle ledit premier segment de circuit effectue une acquisition et un stockage desdites données de mesure du circuit alors que ladite sonde de température (110) est placée en contact physique avec une cible et dans laquelle ledit second segment de circuit traite lesdites données de mesure du circuit reçues de ladite sonde (110) pour évaluer ladite température cible.
- Dispositif d'évaluation de température (150), comprenant :un second segment de circuit comprenant des composants de traitement configurés pour évaluer une température cible d'un site de corps humain ciblé ; et dans lequel ledit second segment de circuit comprend un noeud de communication qui est configuré pour communiquer avec un premier segment de circuit d'une première sonde de mesure de température (110) ;
et dans lequelledit premier segment de circuit réside dans ladite première sonde de mesure de température (110), est placé de manière séparée dudit dispositif d'évaluation de température (150) et communique des données de mesure du circuit et des informations de corrélation de température,lesdites informations de corrélation de température comprenant un premier modèle procédural personnalisé corrélant lesdites données de mesure du circuit avec une température de sonde et ladite température cible, dans lequelledit premier modèle procédural personnalisé comprend une expression mathématique (480) qui comprend une variable de prédiction de température (482) déterminée comme une fonction d'une pluralité de valeurs de données de mesure du circuit, chaque valeur de données de mesure du circuit étant associée à une variable de valeur de coefficient (474a - 474d) et à une variable de valeur de temps (476b - 476d) ; et dans lequellesdits composants de traitement sont configurés pour traiter lesdites données de mesure du circuit et lesdites informations de corrélation de température comprenant ledit premier modèle procédural reçu dudit premier segment de circuit en saisissant une partie desdites données de mesure du circuit dans ladite expression mathématique pour évaluer ladite température cible ; etlesdits composants de traitement sont configurés pour traiter un second modèle procédural personnalisé d'une seconde sonde de mesure de température (110) interchangeable avec la première sonde de mesure de température (110), dans lequel le second modèle procédural personnalisé est différent du premier modèle procédural personnalisé. - Dispositif d'évaluation de température (150) selon la revendication 14, dans lequel ledit noeud de communication comprend un second connecteur de bus série universel (154) configuré pour établir une connexion électrique avec un premier connecteur de bus série universel (124) dans ledit premier segment de circuit, ladite connexion électrique étant détachable et rattachable entre lesdits premier (124) et second (154) connecteurs de bus série universel.
- Dispositif d'évaluation de température (150) selon la revendication 14, dans lequel ledit noeud de communication dudit second segment de circuit fonctionne dans un canal de communication sans fil qui offre une communication vers ledit premier segment de circuit.
- Dispositif d'évaluation de température (150) selon la revendication 14, dans lequel ladite sonde de mesure de température (110) est attachable de manière amovible audit et dudit dispositif d'évaluation de température (150).
- Dispositif d'évaluation de température (150) selon la revendication 15, dans lequel une première température cible est évaluée pour une première sonde de mesure de température (110) ayant un premier ensemble de caractéristiques électriques et thermiques et un premier modèle procédural, avec ladite première sonde (110) ayant une première connexion de communication audit dispositif d'évaluation de température (150), et dans lequel une seconde température cible est évaluée pour une seconde sonde de mesure de température (110) ayant un second ensemble de caractéristiques électriques et thermiques associées et un second modèle procédural, avec ladite seconde sonde de mesure de température (110) ayant une seconde connexion de communication audit dispositif d'évaluation de température (150), et dans lequel lesdits premier et second ensembles présentent au moins une caractéristique électrique, une caractéristique thermique et/ou un modèle procédural différents.
- Dispositif d'évaluation de température (150) selon la revendication 14, dans lequel ledit second segment de circuit est mis en oeuvre, au moins en partie, comme un logiciel s'exécutant dans un ordinateur (150) ou dans lequel ledit second segment de circuit fait partie d'un dispositif portatif.
- Dispositif d'évaluation de température (150) selon la revendication 14, dans lequel une définition dudit premier modèle procédural personnalisé est représentée par un ensemble de directives de langage de programmation informatique.
- Système d'évaluation de la température à un site cible, comprenant :au moins une première sonde de mesure de température (110) selon l'une des revendications 1 à 13, etun dispositif d'évaluation de température (150) selon l'une des revendications 14 à 20.
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PCT/US2010/059674 WO2011081825A2 (fr) | 2009-12-31 | 2010-12-09 | Sonde de mesure de température |
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2009
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2010
- 2010-12-09 CN CN201080064279.XA patent/CN102770064B/zh not_active Expired - Fee Related
- 2010-12-09 WO PCT/US2010/059674 patent/WO2011081825A2/fr active Application Filing
- 2010-12-09 AU AU2010337180A patent/AU2010337180B2/en not_active Ceased
- 2010-12-09 EP EP10841469.9A patent/EP2519143B1/fr not_active Not-in-force
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2014
- 2014-06-16 US US14/305,554 patent/US9719862B2/en active Active
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2017
- 2017-07-28 US US15/662,919 patent/US10054498B2/en active Active
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Title |
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None * |
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US9719862B2 (en) | 2017-08-01 |
WO2011081825A3 (fr) | 2011-11-17 |
EP2519143A4 (fr) | 2016-01-13 |
US20170328787A1 (en) | 2017-11-16 |
EP2519143A2 (fr) | 2012-11-07 |
US20140297215A1 (en) | 2014-10-02 |
US10054498B2 (en) | 2018-08-21 |
CN102770064A (zh) | 2012-11-07 |
US8794829B2 (en) | 2014-08-05 |
AU2010337180B2 (en) | 2014-05-01 |
AU2010337180A1 (en) | 2012-08-02 |
US20110158283A1 (en) | 2011-06-30 |
CN102770064B (zh) | 2016-05-18 |
WO2011081825A2 (fr) | 2011-07-07 |
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